Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d362402f220ba01…

MALICIOUS

PDF

86.5 KB Created: 2021-06-30 21:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13e2f884dced82e898dec60e257055dc SHA-1: 7496d7100c8e51164af1fee2e30368c51c5c39f3 SHA-256: 7d362402f220ba015c8a2b4817a3095c031f08dbc96a43d61333f11bf2db3608
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd9d025fa6---ladefan.pdf
    • https://canevastoilestjean.com/upload/editor/file/mupifoxakoj.pdf
    • https://floraplant.gr/FCKeditor/userimages/file/16128513066.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/98429759597.pdf
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/59555803795.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f2b7ac0d648d4e646ae9c3d18c060e5e/zezakaparulagebuwazulo.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160909084efa7a---69364412108.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a06545d1a87---tugifesuxaduwofavilirorit.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5c0d96032---xoseves.pdf
    • https://isosklo.cz./uploads/sotetojigibogivonalakajaw.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce091eb5f2---xizigomu.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5284eb9944---josofori.pdf
    • http://hrt-foto.hu/_user/file/gejorajesilaf.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737921358d3---rujirilunumufalupuputoji.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac049cc7a08---4957089631.pdf
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/51125567116.pdf
    • http://domplus.su/userfiles/files/313724700.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/fakuke.pdf
    • http://snypes.nl/img/customer//files/26333983803.pdf
    • http://sxhk365.com/uploads/file///bebepasudapavu.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/b2qfgfk0s9vstllod84c5bjjd2/909095984.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a224ab34e5---wipanatemupimapibub.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=different+deployment+models+in+cloud+computing
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef54.bin
436ae67c15ae1e90edc4ffcbea6d738fd443987fa8e04e0844adb2b45c665ceb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 11016 bytes
font_01_sfnt_off000108c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C2 16792 bytes
font_02_sfnt_off000120d4.bin
e877785d80151f3d40bffe714dccd0d7451f547d1038efed7d557a35fee9af44
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D4 16728 bytes